* {
    margin: 0;
    padding: 0;
    list-style: none;
}

a {
    text-decoration: none;
    color: #666666;
}

.ppzq {
    box-sizing: border-box;
    padding-top: 50px;
    width: 1080px;
    height: 180px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

.p1 {
    width: 300px;
    height: 40px;
    display: flex;
    justify-content: space-between;
}

.p1>div {
    height: 1px;
    background-color: #666666;
    width: 32%;
    margin-top: 12px;
}

.p2 {
    font-size: 14px;
    text-align: center;
    line-height: 24px;
}

.main {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
}

.m-m {
    width: 24%;
    height: 460px;
    margin-right: 1%;
    background-color: #e4e4e4;
    margin-bottom: 15px;
    box-sizing: border-box;
    padding: 8px;
}

.m-n {
    width: 100%;
    height: 100%;
    background-color: white;
}

.dpm {
    margin-top: 30px;
}

.m-n>p {
    text-align: center;
    line-height: 70px;
    font-size: 14px;
}

.zsm {
    position: relative;
}

.mb {
    width: 100%;
    height: 0;
    padding: 0;
    position: absolute;
    top: 0;
    left: 0;
    background-color: rgba(0, 0, 0, .5);
    transition: all 0.3s linear;
    box-sizing: border-box;
    overflow: hidden;
}

.m-m:hover .mb {
    height: 100%;
    padding: 90px 0;
}

.mb>p {
    color: white;
    text-align: center;
    line-height: 34px;
}

.zsm>img:nth-child(1) {
    display: none;
}

.gz2 {
    margin-left: 100px;
    margin-top: 40px;
    margin-bottom: 21px;
    display: none;
}

.m-m:hover .gz1 {
    display: none;
}

.m-m:hover .gz2 {
    display: block;
}

.m-m:hover {
    background-color: #aaaaaa;
}